A large-range magnetostrictive displacement sensor device

Abstract

The present invention relates to a large-range magnetostrictive displacement sensor device, comprising an I-beam, a housing mounted on the I-beam, a mounting plate arranged in the housing and located on the top surface of the I-beam, and a magnetic mark arranged on the mounting plate, wherein a plurality of housings connected to each other are arranged on each I-beam, the mounting plate and the magnetic mark are prefabricated in the housing, the two side plates of the housing are fixedly connected to the I-beam, and a magnetostrictive displacement sensor is arranged on one side of the I-beam. The present invention uses a position sensor based on the magnetostrictive effect to sense a sequence of magnetic marks arranged along a guide rail, calculates absolute position information through sequence coding, and obtains a positioning technology for continuous linear displacement measurement, which can solve the measurement limit of the magnetostrictive displacement sensor, realize kilometer-level long-range measurement, and can perform high-precision measurement under harsh conditions such as high temperature, high humidity, rain and fog, and high vibration.

Description

Technical Field

[0001] The invention relates to a large-range magnetostrictive displacement sensor device. Background Art

[0002] Material transfer is an important part of metallurgy, industrial manufacturing, logistics warehousing and civil transportation. The large-scale transfer equipment involved, such as overhead cranes, rail transfer vehicles and freight elevators, can have a maximum travel of hundreds or even thousands of meters. However, the existing position control methods of these equipment are mainly based on manual and proximity switches. Manual control requires close cooperation between position observers and equipment controllers, requires high experience from personnel, often requires repeated positioning, and has insufficient control accuracy and low operating efficiency. Position detection based on proximity switches can only detect discrete position points of the transfer equipment in the operation path, but cannot detect the real-time position of the equipment. After the transfer equipment is shut down and restarted, its absolute position cannot be automatically detected, and there is a lack of guarantee for the equipment safety in the material flow process. These rough and inefficient positioning methods severely limit the speed of material transfer, reduce production efficiency and safety, and hinder the digitalization and intelligent reform of industrial production.

[0003] Accurate positioning of logistics transfer vehicles is the basis for realizing factory automation and intelligence. In particular, achieving long-distance stable measurement under harsh conditions such as high temperature, high humidity, vibration, rain and fog is a major problem in the automation of the metallurgical industry, which has hindered the development of automation and intelligence of some metallurgical processes.

[0004] The existing long-range measurement technologies include the following: absolute photoelectric encoder + magnetic nail, steel belt code ruler, QR code visual measurement, laser distance measurement, Gray busbar, etc. Among them, optical vision sensors such as steel belt code ruler, laser distance measurement, QR code, etc. have high requirements for equipment stability, space size and environmental cleanliness, and cannot be used in complex environments such as strong vibration, narrow space, rain, dust and severe electromagnetic interference. The core technology of most long-range measurements is inductive sensors, and most of the domestic optical high-precision sensors are still imported, combined with independent peripheral structural parts to achieve long-range high-precision measurement.

[0005] Gray busbar detection technology is generally used for measurements under harsh conditions. It is applied in the positioning of intelligent cranes and stacker-reclaimers in metallurgy. However, Gray busbar detection technology has problems such as general detection accuracy, high power consumption, complex installation, and high cost. It is also not suitable for some occasions such as explosion-proof and outdoor ground rail lifting equipment.

[0006] The leading companies in magnetostrictive displacement sensor technology are mainly concentrated in North America and Western Europe, such as MTS in the United States, BALLUFF in Germany, and ASM in Germany. These companies have strong strengths in product research and development, technological innovation, and market application. Foreign companies have a high level of accuracy, stability, and reliability in magnetostrictive displacement measurement systems, and can meet the measurement needs in various complex environments. However, magnetostrictive displacement sensors are mainly limited by the attenuation of guided waves in the guide wire, and their detection range is generally 25 meters, which cannot achieve high-precision long-distance measurement. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a large-range magnetostrictive displacement sensor device, which can realize long-range measurement and high-precision measurement under adverse conditions such as high temperature, high humidity, rain and fog, and the product is easy to install.

[0008] The technical solution adopted by the present invention is: A large-range magnetostrictive displacement sensor device comprises an I-beam, a shell mounted on the I-beam, a mounting plate arranged in the shell and located on the top surface of the I-beam, and a magnetic mark arranged on the mounting plate. A plurality of shells connected to each other are arranged on each I-beam, the mounting plate and the magnetic mark are prefabricated in the shell, two side plates of the shell are fixedly connected to the I-beam, and a magnetostrictive displacement sensor is arranged on one side of the I-beam.

[0009] Furthermore, the shell is in a convex shape as a whole, including a top plate, vertical plates arranged at the left and right ends of the top plate, a horizontal plate arranged at the ends of the vertical plate, and a tail plate arranged at the ends of the horizontal plate. The tail plate is arranged vertically, the magnetic mark is arranged in the space formed by the top plate and the vertical plate, and the mounting plate is arranged in the space formed by the horizontal plate, the tail plate and the top surface of the I-beam.

[0010] Furthermore, a rubber plug is arranged on the top surface of the mounting plate through a connecting column, and the rubber plug is hemispherical. The rubber plug passes through the connecting hole arranged on the horizontal plate from bottom to top and covers the connecting hole.

[0011] Furthermore, a wave-shaped connecting groove is provided on the contact surface of the magnetic mark and the vertical plate, and a connecting protrusion matched with the connecting groove is provided on the inner side surface of the vertical plate.

[0012] Furthermore, a steel belt is fixedly connected to the bottom surface of the tail plate, a fixing plate is arranged at the other end of the steel belt, a through hole is arranged in the middle of the I-beam, and two fixing plates arranged opposite to each other are fixedly connected by bolts.

[0013] Furthermore, the tail plate extends downward to the bottom of the I-beam, and mounting seats are provided on both sides of the bottom surface of the I-beam, a rotating shaft is provided between the two oppositely arranged mounting seats, shift forks are provided at both ends of the rotating shaft, and a slot for matching with the shift fork is provided on the lower side of the tail plate.

[0014] Furthermore, an eccentric top plate is provided between the two fork arms of the shift fork. As the shift fork deflects, the eccentric top plate cooperates with the lower side of the slot to tighten the housing onto the I-beam.

[0015] Furthermore, the clamping slot is a long slot, and the shift fork can cooperate with the long slot in a horizontal state.

[0016] Furthermore, a turbine is mounted on the rotating shaft, and a worm matched with the turbine is provided on the bottom surface of the I-beam.

[0017] Furthermore, each housing is matched with two shift forks, and two rotating shafts are correspondingly arranged on the I-beam. The thread on the worm is divided into two sections, which are matched with the turbines on the two rotating shafts respectively, and the rotation directions of the two sections of the thread are opposite.

[0018] The positive effects of the present invention are: The present invention uses a position sensor based on the magnetostrictive effect to sense a magnetic mark sequence arranged along the guide rail, calculates absolute position information through sequence encoding, and obtains a positioning technology for continuous linear displacement measurement. This technology can overcome the measurement limit of the magnetostrictive displacement sensor, realize kilometer-level long-range measurement, and can perform high-precision measurement under adverse conditions such as high temperature, high humidity, rain and fog, and high vibration.

[0019] The present invention prefabricates a combination of a shell, a magnetic mark and a mounting plate in a factory, and then installs the shell on the I-beam in order at the use site, and ensures that the distance between the magnets of the two shells is sufficient. The installation is very quick and convenient, and can greatly reduce the time required for on-site construction. At the same time, it reduces on-site measurements, can effectively reduce errors caused by installation, and has higher measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the shell structure of the present invention; Figure 3 It is a schematic diagram of the cooperation between the magnet and the shell of the present invention; Figure 4 This is a schematic diagram of the connection structure between the shell and the I-beam of the present invention; Figure 5 This is a schematic diagram of another connection structure between the shell and the I-beam of the present invention; Figure 6 This is a schematic diagram of the card slot structure of the present invention; Figure 7It is a schematic diagram of the shift fork of the present invention. DETAILED DESCRIPTION

[0021] As attached Figure 1-7 As shown, the present invention discloses a large-range magnetostrictive displacement sensor device, including an I-beam 1, a shell 2, a mounting plate 3, a magnetic mark 4 and a magnetostrictive displacement sensor, wherein the shell 2 is mounted on the top surface of the I-beam 1, and the magnetic mark 4 is fixedly arranged on the mounting plate 3, which is connected to the shell 2 and arranged between the I-beam 1 and the shell 2. A combination of the shell 2, the mounting plate 3 and the magnetic mark 4 can be prefabricated in a factory, and several combinations can be installed on the I-beam 1 at the construction site to realize the assembly of the equipment. The magnetostrictive displacement sensor is arranged on a corresponding transfer vehicle or overhead crane, and the arrangement direction of the I-beam 1 is consistent with the movement direction of the magnetostrictive displacement sensor.

[0022] The shell 2 is in a convex shape as a whole, including a top plate 204, vertical plates 203 arranged at the left and right ends of the top plate 204, a horizontal plate 202 arranged at the bottom end of the vertical plate 203, and a tail plate 201 arranged vertically and fixed to the horizontal plate 202 at the upper end. The magnetic mark 4 is arranged in the space formed by the top plate 204 and the two vertical plates 203, and the mounting plate 3 is arranged in the space formed by the horizontal plate 202, the tail plate 201 and the top surface of the I-beam 1.

[0023] A wavy connection groove 6 is provided on the magnetic mark 4 and on the contact surface with the vertical plate 203. A connection protrusion 7 adapted to the connection groove 6 is provided on the inner side of the vertical plate 203. The position of the connection protrusion 7 can be set according to the actual processing requirements. The connection groove 6 and the connection protrusion 7 can play a limiting role to prevent the displacement of the magnetic mark 4 after it is installed in place, and ensure the accurate installation position of the magnetic mark 4. A connection hole is provided on the horizontal plate 202. A rubber plug 8 is provided on the top surface of the mounting plate 3 through a connecting column 9. The rubber plug 8 is hemispherical and its diameter is slightly larger than the diameter of the mounting hole. The rubber plug 8 passes through the connection hole from bottom to top to connect the mounting plate 3 and the horizontal plate 202 together, and the mounting hole can be covered. In the factory, the magnetic mark 4 can be fixed to the mounting plate 3 in advance, and then the mounting plate 3 is installed on the horizontal plate 202 through the connecting column and the rubber plug. At the construction site, it is only necessary to ensure the spacing of the magnetic mark 4 between the two adjacent shells 2. The shell 2 is fixed to the I-beam 1 to complete the installation. There are fewer on-site construction steps and the installation speed is fast.

[0024] As for how to install the shell 2 on the I-beam 1, the present invention provides two solutions. One solution is as shown in the attached Figure 4 As shown, a steel belt 14 is fixedly installed at the bottom end of the tail plate 201, a fixing plate 5 is arranged at the other end of the steel belt 14, a transverse through hole is arranged in the middle of the I-beam 1, and two fixing plates 5 arranged opposite to each other are fixedly connected by bolts. The steel belt 14 is used to press the housing 2 tightly against the top surface of the I-beam 1, thereby realizing the installation and fixing of the magnetic mark 4.

[0025] Another solution is as follows Figure 5-7 As shown, the tail plate 201 extends downward to the bottom of the I-beam 1, and opposite mounting seats 10 are provided on the left and right sides of the bottom surface of the I-beam 1, and a rotating shaft 11 is provided between the two opposite mounting seats 10, and a shift fork 12 is provided at both ends of the rotating shaft 11, and a clamping groove 205 for matching with the shift fork 12 is provided at the lower end of the tail plate 201. Due to the existence of the clamping groove 205, the tail plate 201 can be located between the two fork arms of the shift fork 12, which can provide downward force and also play a role of limiting to prevent the tail plate 201 from moving in the lateral direction. The shift fork 12 presses the clamping groove 205 downward, thereby applying a downward force to the tail plate 201, so that the housing 2 and the I-beam 1 are closely matched.

[0026] Preferably, an eccentric top plate 13 is provided between the two fork arms of the shift fork 12. As the shift fork 12 deflects, the eccentric top plate 13 cooperates with the lower side of the slot 205, and as the shift fork 12 rotates, the eccentric top plate 13 applies a greater and greater force to the slot 205, thereby tightening the housing 2 on the I-beam 1. In order to ensure that the shift fork 12 can smoothly cooperate with the slot 205, the slot 205 is in the shape of a long slot, and when the shift fork 12 is in a horizontal state, the shift fork 12 can pass through the slot 205. At the same time, the slot 205 is in the shape of a long slot, which can also allow the housing 2 to move a certain amount along the I-beam 1. Even if the position needs to be adjusted, the shift fork 12 can still cooperate with the slot 205.

[0027] Preferably, a turbine is provided on the rotating shaft 11, and a worm matched with the turbine is provided on the bottom surface of the I-beam 1. Specifically, each housing 2 corresponds to two shift forks 12, and two rotating shafts 11 are provided on the bottom surface of the I-beam 1, and a turbine is provided on each rotating shaft 11. The worm cooperates with the two rotating shafts 11 at the same time, driving the two rotating shafts 11 to rotate in opposite directions. In order to make the rotation directions of the two rotating shafts 11 opposite, two thread sections with opposite thread rotation directions can be provided on the worm. Alternatively, a thread section is provided, but the turbine directions on the two rotating shafts 11 are opposite. The housing 2 is tightened or loosened by rotating the rotating shaft 11.

[0028] The present invention can realize a magnetostrictive displacement sensor with a large sensing distance and can work stably in a high temperature and high humidity environment. Most of the workpieces can be prefabricated in the factory in advance according to the needs, and can be installed with simple operations at the construction site, which greatly improves the installation efficiency.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A large-range magnetostrictive displacement sensor device, characterized in that The invention comprises an I-beam (1), a shell (2) mounted on the I-beam (1), a mounting plate (3) arranged in the shell (2) and located on the top surface of the I-beam (1), and a magnetic marker (4) arranged on the mounting plate (3); a plurality of shells (2) connected to each other are arranged on each I-beam (1); the mounting plate (3) and the magnetic marker (4) are prefabricated in the shell (2); side plates (201) on both sides of the shell (2) are fixedly connected to the I-beam (1); and a magnetostrictive displacement sensor is arranged on one side of the I-beam (1).

2. A large-range magnetostrictive displacement sensor device according to claim 1, characterized in that The housing (2) is in a convex shape as a whole, comprising a top plate (204), vertical plates (203) arranged at left and right ends of the top plate (204), a horizontal plate (202) arranged at the ends of the vertical plates (203), and a tail plate (201) arranged at the ends of the horizontal plate (202); the tail plate (201) is arranged vertically, the magnetic mark (4) is arranged in a space formed by the top plate (204) and the vertical plates (203), and the mounting plate (3) is arranged in a space formed by the horizontal plate (202), the tail plate (201) and the top surface of the I-beam (1).

3. A large-range magnetostrictive displacement sensor device according to claim 2, characterized in that A rubber plug (8) is provided on the top surface of the mounting plate (3) via a connecting column (9); the rubber plug (8) is hemispherical, and the rubber plug (8) passes through a connecting hole provided on the horizontal plate (202) from bottom to top to cover the connecting hole.

4. A large-range magnetostrictive displacement sensor device according to claim 2 or 3, characterized in that A wave-shaped connecting groove (6) is provided on the magnetic mark (4) and on the contact surface with the vertical plate (203), and a connecting protrusion (7) matching the connecting groove (6) is provided on the inner side surface of the vertical plate (203).

5. A large-range magnetostrictive displacement sensor device according to claim 2, characterized in that A steel belt (14) is fixedly connected to the bottom surface of the tail plate (201), a fixing plate (5) is arranged at the other end of the steel belt (14), a through hole is arranged in the middle of the I-beam (1), and two fixing plates (5) arranged opposite to each other are fixedly connected by bolts.

6. A large-range magnetostrictive displacement sensor device according to claim 2, characterized in that The tail plate (201) extends downward to below the I-beam (1), mounting seats (10) are provided on both sides of the bottom surface of the I-beam (1), a rotating shaft (11) is provided between two mounting seats (10) arranged opposite to each other, shift forks (12) are provided at both ends of the rotating shaft (11), and a slot (205) for matching with the shift fork (12) is provided on the lower side of the tail plate (201).

7. A large-range magnetostrictive displacement sensor device according to claim 6, characterized in that An eccentric top plate (13) is provided between the two fork arms of the shift fork (12); as the shift fork (12) deflects, the eccentric top plate (13) cooperates with the lower side of the clamping groove (205) to tighten the housing (2) onto the I-beam (1).

8. A large-range magnetostrictive displacement sensor device according to claim 7, characterized in that The clamping slot (205) is a long slot, and the shift fork (12) can cooperate with the long slot in a horizontal state.

9. A large-range magnetostrictive displacement sensor device according to claim 6, characterized in that A turbine is mounted on the rotating shaft (11), and a worm gear matching the turbine is provided on the bottom surface of the I-beam (1).

10. A large-range magnetostrictive displacement sensor device according to claim 9, characterized in that Each housing (2) is matched with two shift forks (12), and two rotating shafts (11) are correspondingly arranged on the I-beam (1). The thread on the worm is divided into two sections, which are matched with the turbines on the two rotating shafts (11) respectively, and the rotation directions of the two sections of the thread are opposite.

Images